Polishing machine



'3 Sept. 6, 1932. a. w. VEALE 1,875,962

POLISHING MACHINE Filed Aug. 22. 1927 Patented Se t. 6, 1932 UNITEWATES GEORGE w. VEALE, orcnnvnreun nnren'rs, oHIo, nssrenon 'ro THE EATON metrj rnornnme COMPANY, or CLEVELAND, onro, A CORPORATION or orno POLISHING MACHINE Application filed au ust 22, 1927. Serial N0.214,536., I

This invention relates to improvements'in mechines for polishing bumper bars'of the type employed at eachside of the rear of an automobile, and is of: special utilitywherethe bars acted upon have their impactsurfaces grooved.

In such machines asco'nstituted previous to my invention, the polishing wheelsb'ecome worn quickly by the ribson the bars be tween the grooves, and frequent removal of the wheels and substitutions of newly surfaced ones are required. i

One of the objects of my invention isthe provision of means which will permit the pol- :ishingof grooved bars with an even wear upon the abrading surface of the polishing wheel.

A more specific object is the provision of means for imparting motion to the bar holder at right angles to the plane of the polishing Wheel, and more especially for imparting a plurality of reciprooations for each revolution of the holder. v

Other objects and features of novelty will appear as I proceed with the description of that embodiment of the invention which, for the purposes of the present application, I have illustrated in the accompanying drawing, in which:

Fig. 1 is a side elevational view of a ma chine embodying my invention;

Fig. 2 is an end elevational view of the work supporting rack showing the relation between the polishing wheels and the bumper bars in position on the rack; and

Fig. 3 is a fragmental sectional view taken substantially on the line 3-3 Fig. 2.

The machine as illustrated herein comprises a pair of supporting beams 10 to which are bolted standards 11 and 11' supporting bearings for a shaft 12, these bearings being so constituted as to permit longitudinal movement of the shaft therethrough. Shaft 12 carries a work supporting rack which in-- cludes two circular side plates 13 and 13, the hubs of which are pinned as at 14 to the shaft.

These plates are joined near their peripheries by a series of fixed rods 15 and 16 and rotatable rods 17. The rods 15 and 16 each have two sets of collars 18 assuming that the machine isbuilt for twopolishing wheels,'as

hereinillustrated, which collars are adapted toprop erly align the bars 19 to be worked upon. When a pair of bars are to be mounted on the rack or carrier, the han'dle20on rod '17 is swung around so as to direct the pins 21 in that rod backwardly in the general dieach bar 19 is then hooked around therod1'5 between the collars 18 thereon and theo ther; end is swung down over the rods 16 and 17 'be' rection of the rods 16 and 15. One end'of tween the collars 1 8-on the-rod 16. I Assumin that both bars are in place on a-giv'en set of -rods,-the handle 20is turned anti-clockwise to bring pins 21 into the hooks of the bumper 1 bars and untilthe pinsarebeyond-the dead center positions where the resilience of the curved bars 19 holds the pins. The bars are thus- *lockedin position. The reverse procedure is, of course a-rs. v V

Therack is rotated quite slowly by-abelt 22 running over a pulley 23 fixed to the shaft 12, the belt being of some little' length so that it is';not displacedby the lengthwise movement of-shaft 12 later to be described. Drive for the belt 22 comesfrom asmall pulley 40 which rotates with a large gear wheel 41-;that is driven by a pinion 42 fixed with respect to a pulley 43 that is driven by a --belt 44 from a small pulley 45 on a shaft 33 to be referred to again hereinafter.- When a pair of polished bars are removed from a A set'of rods 15, 16,17 and a pair of unpolished bars put into their places, the machine is- 7 caused to resume movement until a pair of bars havetraversed the polishing' wheels.

- Attheleft end of the rack between plate 13' and-standard 11, I employ a'cam mecha nism adapted to shift the rack to the right, as viewed in F ig '2. In the form illustrated,

an annularcam- 24 with a number of high spots is attached to the plate 13- in a position concentric with the shaft 12, being secured to the plate preferably by stud bolts 25. A pair of brackets 26 bolted to-thestandard11carry a roller 27 which bears upon the face of followed in removing-the the cam 24. It "is, of course, immaterial whether the cam be on the" rotating part and the follower on the fixed part or: whether their arrangement be reversed. In order to hold the cam 24 up against the follower 27 at all times and to shift the rack to the left as the low spots of the cam come opposite the follower 27, I mount a coil spring 28 upon the shaft 12 between the standard 11 at the right handside of-the machinetand a sleeve 29 which may be either separate from orfastened' to the plate 13".

' Thepolishing wheels are shown at'BO, he 7 ing mounted-on asha-ft 31 of some vertical movement.

which is capable This shaft. may

be rotated by any suitable means, as by a belt 32 driven from a shaft33 which .is in turndriven by a motor 34 or other source of power." The working faces of'ithe wheels '30 "are of'a, breadth suflicient to cover the bars .19 fin all ,positions of :the work, supporting track resulting from its transverse movement.

preferably employ :a icam 'with'as many high spots on it as there-are setsof; supporting rods I5, 16, :17, but it is essential only that there Tbea-constant transverse movement of the rackas eachzpairof bars moves-underthepols :ishing wheels. a t 3 Owing :to the factizthatrthe 'curvatu-rerof "theirbars l9is "which supports the bars, the polishing wheels difierentfromthat of therack i-must-have ai slight vertical movement. To thisend they are" mounted in a frame 46 which is mounted to swing about the shaft 33. The frame 46 zisrbalancedib'y; means of a beam' 47'pivoted at 48' toiabracket 49 and .pivotally'conneoted at "50to-:the frame 46. A I @properbalance is attained by aweiglit: 51 and 7 an adjustable weight 52.

described my invention, I

rack parallel to its :axis during each :revolu- "tlOIL'Of theErack.

2. Ina machine for polishing bumper bars,

ea rotatable rack-means for supporting the "bars-upon the periphery of-said rack in a rplaneiatpright anglesto the axis of said rack, means for rotating said rack continuously :end to end in a plane at rightuangles to the 3. In a machine for polishing bumper bars, a slowly moving rotatable rack, means for supporting the bars upon the periphery of said rack, in a plane at right angles to the axis of the rack, means for rotating said rack continuously, a polishing wheel movable radially 'ofsaid rack and'ad'apted 'to contact with the bars and pass over their surfaces longitudinally as the rack rotates, a cam on one-side ofthe'rack having "a plurality of high spots-for imparting'axialmotion to the rack during its rotatlon, and a spring upon theopposite side of the rack for returning ,.the same.

4. In a'rnaohine of the character described,

thecombination of aframe,-araokrotatably carried by said' fra'me, means for supporting the work. in an end toend position in a plane at right angles to the axisofthe rack, means for continuously rotating said rack meanjs pivotally carried by said frame and'adapted tosupport a polishing wheellin a position to contact withthe work and;pass over the surface-thereof longitudinally g as the rack rotates, a cam on -one side of the rack for imrotation, and a spring upon. the oppositeside of the rack for returning the same.

In-testimonyrwhereof, Ihereunto aflix my signature.

parting axial motion to "therackfduring its GE, w. am:

axis of the rack, a polishing wheel movable t-ra'dia'llylof said rack and-adapted'to, contact w1ththeibarsand pass over'their surfaces longitudinally as the 'raeksrotates,-acam on *1 one side of the rack.-for'imparting axial mof'tion to the rack during'itsrotation, and a sprlng-gl-lponthe oppositesideof the rack for returning the same. V r

CERTIFICATE OF CORRECTION.

September 6, 1932.

Patent No. 1, 875, 962.

GEORGE W. VEALE.

It is hereby certified that the name of the assignee in the above numbered ed as "The Eaton Manufacturing patent was erroneously described and specifi Company", whereas said name should'have been described and specified as Eaton as shown by the records of assignments in this office;

Manufacturing Company, and that the said Letters Patent should be read with this correction therein d of the case in the Patent Office.

that the same may conform to the recor Signed and sealed this 22nd day of November, A. D. 1932.

M. J. Moore,

Acting Commissioner of Patents.

(Seal) 

